Industrial Grade Assay Na5P3O10 % ≥ 94.0 P2 O 5 % ≥ 57.0 Water Insoluble Matter % ≤ 0.15 Iron(Fe) % ≤ 0.015 PH value (1% water solution) 9.2-10.0 Whiteness % ≥ 90 Ignition loss 1.0 density (g/cm3) 0.35-0.9 Phase I 10-30 Food Grade Assay Na5P3O10 % ≥ 94.0 P2 O 5 % ≥ 57.0 Water Insoluble Matter % ≤ 0.05 Iron(Fe) % ≤ 0.015 PH value (1% water solution) 9.5-10.0 Heavy Metal (as Pb) % ≤ 0.001 Arsenic (As) % ≤ 0.0003 Fluoride (F) % ≤ 0.003 Whiteness % ≥ 90 Ignition loss / density (g/cm3) 0.35-0.9 Phase I 10-30 You are welcome to send me inquiry any time.